Illinois recreational cannabis tax rates run from about 16% on low-potency flower in a lightly taxed town to over 40% on high-potency concentrates bought in Chicago. Three separate taxes stack on every purchase: a state excise tax tied to THC potency (10%, 20%, or 25%), the 6.25% state sales tax, and local cannabis taxes that vary by city and county. What you pay at the register comes down mostly to two choices: what product you buy and where you buy it.
State Excise Tax by Product and Potency
The excise tax is the piece that moves the most, and it’s set in the Cannabis Regulation and Tax Act at 410 ILCS 705/65-10.1Illinois General Assembly. Illinois Compiled Statutes 410 ILCS 705/65-10 – Tax Imposed Three tiers apply:
- 10% on cannabis flower and other non-infused products with THC concentration at or below 35%. This is where most standard flower lands.
- 25% on flower and non-infused products above 35% THC. Concentrates like wax, shatter, and live resin almost always fall here.
- 20% on any cannabis-infused product regardless of THC content. Edibles, beverages, tinctures, and topicals all sit in this tier.
The excise tax is calculated on the pre-tax purchase price. Retailers assign the tier using the lab-tested THC level printed on the package, so there’s no judgment at the counter. A gram of concentrate labeled at 80% THC pays the 25% rate whether the budtender mentions it or not.
The 6.25% State Sales Tax
On top of the excise tax, every recreational cannabis sale carries the state Retailers’ Occupation Tax at 6.25%, the same rate as general merchandise.2Illinois Department of Revenue. Municipal Cannabis Retailers’ Occupation Tax (MCAN) Cannabis does not qualify for the reduced rate on food, drugs, or medical devices. Even at the lowest excise tier, that puts you at 16.25% in state taxes before any local government adds its share.
Local Taxes: Why Chicago Costs More
Illinois lets both cities and counties stack cannabis-specific taxes on top of the state layers, with caps set by statute.3Illinois Department of Revenue. FY 2026-21, Municipal and County Cannabis Retailers’ Occupation Tax Rate Changes, Effective July 1, 2026 The caps run in quarter-percent increments:
- Municipalities: up to 3%.
- Counties, for dispensaries inside a municipality: up to 3%.
- Counties, for dispensaries in unincorporated areas: up to 3.75%.
Not every local government uses this authority, and the rates vary widely. A small downstate city with no local cannabis tax will ring up noticeably cheaper than a Chicago-area dispensary where both the city and Cook County have pushed cannabis taxes at or near the caps. Standard local sales taxes (such as Regional Transportation Authority taxes in the Chicago area) also apply to cannabis the same way they apply to anything else, adding roughly another percentage point depending on the jurisdiction.
What You Actually Pay at the Register
All of these layers hit the same receipt. On a $100 pre-tax purchase at a dispensary charging the maximum 3% municipal and 3% county cannabis taxes, plus the 6.25% state sales tax, the totals look like this:
- Low-potency flower (≤35% THC): 10% + 6.25% + 3% + 3% = 22.25%. Total around $122.
- Infused products such as edibles and tinctures: 20% + 6.25% + 3% + 3% = 32.25%. Total around $132.
- High-potency products (>35% THC): 25% + 6.25% + 3% + 3% = 37.25%. Total around $137.
In Chicago, the number climbs higher once general local sales taxes are added. A high-potency concentrate bought at a Chicago dispensary can carry a combined effective tax rate above 41%, pushing a $100 product past $141 at the register. Even low-potency flower in Chicago lands above 26% once every layer is counted. These are among the highest combined cannabis tax rates in the country, and they’re the main reason regular buyers plan around product type and dispensary location.
Medical Cardholders Pay Far Less
If you hold a valid medical cannabis card under Illinois’s Compassionate Use program, the tax picture changes dramatically. Medical cardholders are excluded from the definition of “purchaser” under the Cannabis Purchaser Excise Tax, so the entire 10/20/25% tier system does not apply to medical purchases.4Illinois Department of Revenue. Cannabis Taxes
Medical cannabis is also taxed at the “qualifying food and drug” sales tax rate rather than the standard 6.25% general rate. The state portion of that rate is 1%, and local sales tax components are similarly reduced. In practice, a medical patient in Chicago pays roughly 2% to 3% total tax on the same product that would cost a recreational buyer 25% to 41% in taxes. On a $100 purchase of high-potency concentrate, the difference between a medical and recreational transaction can be $35 or more in tax alone.
Whether maintaining a medical card is worth the annual registration fee and physician consultation costs depends on how often you buy and what you buy. For regular buyers of concentrates or edibles, the math tends to favor the card quickly.